CN111283267A

CN111283267A - Pole piece cutting method

Info

Publication number: CN111283267A
Application number: CN202010199314.4A
Authority: CN
Inventors: 杨立华; 邵紫龙
Original assignee: Shandong Hongyun Nano Technology Co Ltd
Current assignee: Shandong Hongyun Nano Technology Co Ltd
Priority date: 2020-03-20
Filing date: 2020-03-20
Publication date: 2020-06-16

Abstract

The application discloses a pole piece cutting method, wherein a lug is cut out when a pole lug is cut out, two corresponding notches are cut out on two sides of a pole piece at the positions of the lugs, and the pole piece is cut out from the middle of the notches.

Description

Pole piece cutting method

Technical Field

The application relates to the technical field of new energy batteries, in particular to a pole piece cutting method.

Background

Laser beam cutting machines have a large number of mature applications and therefore do not present a technical risk. But five metals cutting machine, perhaps five metals are decided lamination all-in-one is a new model, and it compares with current five metals cross cutting and decides all-in-one, and most structure is similar, and the only difference lies in supplied materials discernment and location problem.

As shown in fig. 1, the incoming material of a cutting machine, or cutting-lamination machine, has a distinct feature: the tab, shown in detail in phantom in fig. 1, is used in a conventional fashion for positioning.

The prior art solution, for: the specification that the precision requirement is not high, such as the precision is less than or equal to +/-0.5 mm in the length direction of the pole piece, can meet the requirement, but to the specification that the precision requirement is higher, for example: the accuracy of pole piece length direction is 0.2 mm's specification, and this kind of locate mode just can not satisfy the requirement, and the leading reason is as follows:

firstly, the tab of the negative electrode is soft and easy to deform, so that misjudgment is caused;

secondly, the two sides of the tab are generally oblique angles, specifically see the angle "a" of the enlarged portion in fig. 1, which causes erroneous judgment easily occurring when the visual inspection equipment measures.

Therefore, how to improve the quality of pole pieces with high precision requirements and improve the alignment degree of the lamination is a problem to be solved urgently.

Disclosure of Invention

The application aims to provide a pole piece cutting method, which can greatly improve the precision of the pole piece in the length direction, thereby improving the alignment degree of the lamination and further improving the product quality.

In order to solve the above technical problem, the present application provides a pole piece cutting method, as one of the implementation manners, the apparatus includes:

the pole lug cutting machine cuts pole pieces into pole lugs and bosses at a pole lug cutting station, wherein the bosses are positioned between two adjacent pole lugs;

when the pole piece enters a positioning station, detecting the boss position of the pole piece as a positioning position by using visual detection equipment;

and then, notches are simultaneously cut out on two sides of the pole piece by the first cutting machine according to the positioning position, and the pole piece is cut out in the middle position of the two notches by the second cutting machine.

In one embodiment, the angle between the boss and the side edge of the pole piece is 90 degrees.

In one embodiment, the height of the boss is set to be greater than 3mm and less than the height of the tab.

In one embodiment, the height of the boss is set to 4 mm.

As an embodiment, the method further comprises: the second cutting machine is two the intermediate position of breach is decided behind the pole piece, the pole piece gets into the unloading station and carries out the unloading.

In one embodiment, the notch is shaped as a symmetrical pattern.

In one embodiment, the notch is T-shaped.

In one embodiment, the notch is semicircular in shape.

In one embodiment, the shape of the gap is an isosceles trapezoid.

According to the pole piece cutting method, the lug boss is cut when the pole lug is cut, the two corresponding notches are cut at the two sides of the pole piece at the position of the lug boss, the pole piece is cut from the middle of the notch, and the boss is arranged, so that the accuracy of identifying and positioning of visual detection equipment is improved, the misjudgment probability is greatly reduced, the quality of the pole piece with high precision requirement is greatly improved, the alignment degree of the lamination is improved, and the product quality is greatly improved.

The foregoing description is only an overview of the technical solutions of the present application, and in order to make the technical means of the present application more clearly understood, the present application may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present application more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic diagram of a pole piece tab in the prior art.

Fig. 2 is a schematic structural diagram of a pole piece before a tab and a boss are removed in the embodiment of the application.

Fig. 3 is a schematic diagram of a pole piece structure and a partially enlarged structure of a boss after cutting a tab and a boss in an embodiment of the application.

Fig. 4 is a schematic diagram of a notch structure after cutting off a boss portion of a pole piece in the embodiment of the present application.

Fig. 5 is a schematic structural diagram of a lamination after blanking in the embodiment of the present application.

Detailed Description

To further clarify the technical measures and effects taken by the present application to achieve the intended purpose, the present application will be described in detail below with reference to the accompanying drawings and preferred embodiments.

While the present application has been described in terms of specific embodiments and examples for achieving the desired objects and objectives, it is to be understood that the invention is not limited to the disclosed embodiments, but is to be accorded the widest scope consistent with the principles and novel features as defined by the appended claims.

The first embodiment is as follows:

referring to fig. 2 to 5, fig. 2 is a schematic diagram of a pole piece structure before a pole tab and a boss are removed in an embodiment of the present application, fig. 3 is a schematic diagram of a pole piece structure and a boss portion enlarged structure after the pole tab and the boss are cut in the embodiment of the present application, fig. 4 is a schematic diagram of a gap after the boss portion of the pole piece is cut in the embodiment of the present application, and fig. 5 is a schematic diagram of a structure of a lamination after blanking in the embodiment of the present application. The embodiment of the pole piece cutting method in the embodiment comprises the following steps:

as shown in fig. 2, fig. 2 is an unprocessed pole piece, a shadow part of the unprocessed pole piece is a coating area for processing a tab, and a non-shadow part of the unprocessed pole piece is a foil area; when the unprocessed pole piece passes through the pole lug cutting station, the pole lug A and the lug boss B are cut by the pole lug cutting machine of the pole lug cutting station, wherein the pole lug is composed of a coating area and a foil area, specifically, for example, the pole lug is composed of a coating area of 2.5mm and a foil area of 1.5mm, of course, the specific size of the pole lug can be determined according to specific products, and the specific size is not limited here.

Referring to fig. 3, as shown in an enlarged view of the boss B, a shaded portion is a coating region, the height of the boss B is far less than the height of the tab, and may be set to be greater than 3mm and less than the height of the tab, in this embodiment, the height L1 of the boss is set to be 4mm, and the width L2 of the boss is set to be 4 mm.

In the present embodiment, the tab cutter may be a laser die cutter but is not limited to the laser die cutter.

And then, after the pole piece is cut into a pole lug A and a lug boss B by a pole lug cutting machine, the pole piece leaves a pole lug cutting station and enters a positioning station, and visual detection equipment detects the position of the lug boss of the incoming pole piece at the positioning station and takes the position of the lug boss as a positioning position.

In this embodiment, set up the height L1 of boss to 4mm, can improve the detection accuracy of visual inspection equipment, because the limited detection zone of visual inspection equipment is 3mm generally, and the height of boss is 4mm, and the boss region is because very short, therefore the very high non-deformable of hardness, consequently, the height of 4mm is in the detection range of feeling inspection equipment promptly, and the boss is hard again, can not lead to the erroneous judgement of visual inspection equipment because of warping.

In another embodiment, as shown in fig. 4, the angle B of the boss B to the side edge of the pole piece can be cut to 90 degrees, thereby facilitating the identification and positioning of the boss position by visual detection equipment.

The visual inspection equipment detects the boss position of the incoming material pole piece, and after the boss position is used as the positioning position, the first cutting machine simultaneously cuts out notches C1 and C2 according to the positioning position determined by the visual inspection equipment, namely the boss position and the other side of the corresponding pole piece, and cuts out the boss along the belt when cutting out the notch C1. The positions of the notches C1 and C2 and the enlarged structure are shown in fig. 4, the notches C1 and C2 may be symmetrical patterns, in this embodiment, the notches C1 and C2 are isosceles trapezoids, of course, they may also be T-shaped, semicircular, etc., or they may also be cut into asymmetrical patterns according to the product requirements, and this is not limited here.

After the first cutting machine cuts notches C1 and C2 according to the boss position of the supplied pole piece, the pole piece is sent to a pole piece cutting station, and the second cutting machine at the station cuts the pole piece at the middle position of the two notches, and the specific structure can refer to the broken line cutting part of fig. 4.

And after the pole piece is cut along the notches C and C2 at the pole piece cutting station, the pole piece enters a blanking station for blanking.

In the pole piece cutting method provided by the embodiment, the lug bosses are cut when the pole lugs are cut, the two corresponding notches are cut at the two sides of the pole pieces at the positions of the lug bosses, the pole pieces are cut from the middles of the notches, and the lug bosses are arranged, so that the accuracy of identifying and positioning of the visual detection equipment is improved, and the misjudgment probability is greatly reduced.

Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application, and all changes, substitutions and alterations that fall within the spirit and scope of the application are to be understood as being included within the following description of the preferred embodiment.

Claims

1. A pole piece cutting method is characterized by comprising the following steps:

2. The method of claim 1, wherein the boss is at a 90 degree angle to the side edge of the pole piece.

3. The method of claim 1, wherein the height of the bosses is set to be greater than 3mm and less than the height of the tabs.

4. A method according to claim 3, wherein the height of the boss is set to 4 mm.

5. The method of claims 1-4, further comprising: the second cutting machine is two the intermediate position of breach is decided behind the pole piece, the pole piece gets into the unloading station and carries out the unloading.

6. The method of claim 1, wherein the notch shape is a symmetrical pattern.

7. The method of claim 6, wherein the notch is T-shaped.

8. The method of claim 6, wherein the notch is semi-circular in shape.

9. The method of claim 1, wherein the notch is shaped as an isosceles trapezoid.